make fcitx5 follow qt theme

.config/fcitx5/conf/classicui.conf

@@ -0,0 +1,31 @@
+# Vertical Candidate List
+Vertical Candidate List=False
+# Use mouse wheel to go to prev or next page
+WheelForPaging=True
+# Font
+Font="Rubik 11"
+# Menu Font
+MenuFont="Rubik 11"
+# Tray Font
+TrayFont="Rubik 11"
+# Prefer Text Icon
+PreferTextIcon=False
+# Show Layout Name In Icon
+ShowLayoutNameInIcon=True
+# Use input method language to display text
+UseInputMethodLanguageToDisplayText=True
+# Theme
+Theme=plasma
+# Dark Theme
+DarkTheme=plasma
+# Follow system light/dark color scheme
+UseDarkTheme=False
+# Follow system accent color if it is supported by theme and desktop
+UseAccentColor=True
+# Use Per Screen DPI on X11
+PerScreenDPI=False
+# Force font DPI on Wayland
+ForceWaylandDPI=0
+# Enable fractional scale under Wayland
+EnableFractionalScale=True
+